circumflex /ˈsɜːkəmˌflɛks/

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  N-COUNT A circumflex or a circumflex accent is a symbol written over a vowel in French and other languages, usually to indicate that it should be pronounced longer than usual. It is used for example in the word "rôle." 加在元音上的音调符号; 法语和其它语言中常用，表示此音节在发声时应比平时更长